Story by Isabel Millett.

Acting Commissioner Sir Steve House will step down next month.

He will lead a review of operational productivity in policing overseen by the National Police Chiefs' Council.

Sir Steve stepped into the role of Acting Commissioner in April following the resignation of Dame Cressida Dick. He will remain in post until newly appointed Sir Mark Rowley begins his tenure as Commissioner on September 12.

Incoming Commissioner Sir Mark said: "Sir Steve should be extremely proud of his record as a police leader. His influence has left an enduring mark on policing not just in London but far beyond.

"I am grateful for his stewardship of the Met over the recent turbulent months and know his priority has always been the safety of Londoners."

In addition, two other chief officers will leave their current posts over the coming weeks. Acting Deputy Commissioner Helen Ball has announced she will retire from policing after 35 years on 31 October.

Assistant Commissioner Nick Ephgrave will undertake a secondment to the National Police Chiefs' Council where he will lead the criminal justice portfolio.

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Sir Mark added: "Both Helen and Nick are formidable leaders of the utmost integrity who have dedicated their careers to public service.

"I wish Helen all the very best in her retirement and am delighted that Nick will bring his wealth of experience from more than three decades of policing to this important work on delivering better outcomes for victims of crime.

"I am grateful to be given the opportunity to build a fresh leadership team to take the Met forward."

The Met has today announced it is looking to fill a number of chief officer roles. Details can be found on Scotland Yard's website here.